In the manga

A bird keeper first appears in Who Gives a Hoothoot? where he hosts a game in which the participant has to capture the Wooper that will be let loose in a given amount of time. So far, none of the challengers have succeeded. Gold then accepts the bird keeper's challenge much to his amusement. Unbeknownst to the bird keeper, Gold had his Aibo use Swagger to confuse Hoothoot before they began. The bird keeper starts the challenge and Gold manages to capture many Wooper. When the bird keeper was about to have his Hoothoot stop the clock, Hoothoot started to get confused. The other participants then find out his business being fake. The bird keeper immediately retreats after his cover was blown.

The bird keeper is shown to break the law, conning children and poaching.

The same bird keeper reappears in Really Raikou & Entirely Entei I where he encounters Falkner as he too specializes in bird Pokémon, still in his thieving ways. He shows Falkner his collection of Pokémon recently caught which made Falkner somewhat interested. The bird keeper does not give any of them away. When Raikou and Entei appear, the bird keepers gets excited, which makes him want to catch them. Falkner flies away on his Skarmory and grabs the bird keeper in time before he got hit by Entei. He is then seen riding on Falkner's Skarmory where Falkner uses Skarmory to battle the two legendary Pokémon. The bird keeper had trouble keeping up with Falkner's Skarmory's flying speed. He continues to ride on Falkner's Skarmory in Really Raikou & Entirely Entei II, watching Falkner take on the legendary beasts. After Falkner was unsuccessful in catching them, the bird keeper gets trapped by one of his boomerangs and gets arrested by Falkner.

He makes a cameo in The Last Battle XIII as one of the people who volunteered their Pokémon for transfer.

Pokémon

On Hand

Hoothoot

Hoothoot is the bird keeper's partner Pokémon. In its first appearance, it served as a timer when the bird keeper set up a game in which certain Pokémon have to be captured in a set time. However, the bird keeper had Hoothoot decrease the amount secretly. Gold was able to find out about this when his Aiboswaggered Hoothoot, causing it to get confused. Hoothoot made a cameo in Really Raikou & Entirely Entei I.

Temporary

Wooper

During a fake business, the bird keeper set up a game where the participant was required to capture some Wooper in a given amount of time. They were given special Poké Balls to capture them though. After his business was revealed to be a fake, the Poké Balls which possibly contained the Wooper were left behind and the bird keeper ran off.